Future additions will break outdated app versions

[hig-dev]

When going to the study selection screen, the app loads and deserializes all studies with open participation. The code in the app for the deserialization will fail if it encounters a new unknown type that was added in a new update. E.g. the FreeTextQuestion that will be added with #545.

Here is a list of the problematic lines that I could find:

studyu/core/lib/src/models/observations/observation.dart

Line 15 in 08cbb4d

factory Observation.fromJson(Map<String, dynamic> data) => taskTypes[data[Task.keyType]]!(data);

studyu/core/lib/src/models/results/result.dart

Line 51 in 08cbb4d

throw ArgumentError('Type ${data[keyType]} not supported.');

studyu/core/lib/src/models/report/report_section.dart

Line 22 in 08cbb4d

factory ReportSection.fromJson(Map<String, dynamic> data) => sectionTypes[data[keyType]]!(data);

studyu/core/lib/src/models/study_results/study_result.dart

Line 24 in 08cbb4d

return studyResultTypes[data[keyType]]!(data);

studyu/core/lib/src/models/interventions/intervention_task.dart

Line 15 in 08cbb4d

factory InterventionTask.fromJson(Map<String, dynamic> data) => taskTypes[data[Task.keyType]]!(data);

studyu/core/lib/src/models/questionnaire/question.dart

Line 32 in 08cbb4d

return questionTypes[data[keyType]]!(data) as Question<V>;

studyu/core/lib/src/models/expressions/expression.dart

Line 17 in 08cbb4d

factory Expression.fromJson(Map<String, dynamic> data) => expressionTypes[data[keyType]]!(data);